CN117236674A

CN117236674A - Urban river network hydrodynamic force accurate regulation and control and water environment lifting method and system

Info

Publication number: CN117236674A
Application number: CN202311526232.6A
Authority: CN
Inventors: 廖轶鹏; 刘国庆; 范子武; 杨逸; 李君�; 黄玄; 刘思恩
Original assignee: Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
Current assignee: Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
Priority date: 2023-11-16
Filing date: 2023-11-16
Publication date: 2023-12-15
Anticipated expiration: 2043-11-16
Also published as: CN117236674B

Abstract

The invention discloses a method and a system for accurately regulating and controlling hydrodynamic force of an urban river network and lifting water environment, comprising the following steps: determining the research range of the urban river network, collecting and preprocessing research data in the research range; reading river network data in the research data, constructing an urban river network relation network, constructing and using an AM-GCN module to extract and classify river network relations, forming a first river network relation network, constructing and using a Ring-GCN module to extract and remove isomorphic relation networks from the first river network relation network, and forming a second river network relation grid; constructing an SWMM-GAST-LSTM model aiming at the urban river network, reading research data as input, simulating the hydrodynamic process of the river network, and outputting a simulation result; and reading and analyzing the simulation result, and outputting a river network hydrodynamic force accurate regulation and control scheme set if the target of refined and efficient water distribution is reached. The invention realizes the purpose of fine and efficient water distribution, fully exerts engineering benefits and improves the water quality of river networks.

Description

Urban river network hydrodynamic force accurate regulation and control and water environment lifting method and system

Technical Field

The invention relates to a hydrographic hydrodynamic simulation prediction technology, in particular to a method and a system for accurately regulating and controlling urban river network hydrodynamic and improving water environment.

Background

The urban river network is an important component of urban water environment, and plays an important role in ecological, economic and social development of cities. The hydrodynamic conditions of the urban river network, namely the flow rate, the water level and the like of the river directly influence the aspects of the water quality, the water ecology, the water safety and the like of the river network. Therefore, the method can accurately regulate and control the hydrodynamic force of the urban river network, and is an effective way for improving the water environment of the urban river network. However, due to the rapid progress of urban mass, urban river networks face many challenges such as shortage of water resources, serious water pollution, degradation of water ecology, frequency of water disasters, etc. These problems lead to deterioration of hydrodynamic conditions of the urban river network, such as slowness of water flow, fluctuation of water level, insufficient water quantity, etc. These adverse hydrodynamic conditions further exacerbate the deterioration of the urban river network water environment, forming a vicious circle.

Specifically, in plain cities, the water power is generally weak, and in a purely natural state, river network water flows basically according to a path with minimum resistance, namely, flows away from a river channel with larger river width, so that the mobility of a middle and small river channel is extremely weak, the water environment bearing capacity is low, the water flow can be realized only by means of pump station pumping drainage, and therefore, in order to enable the middle and small river channel in the city to be distributed to a high-quality water source in a self-flowing state as much as possible, internal river network water level control and water quantity distribution research are required to be carried out, so that the accurate regulation and control of the river network water power is realized.

Some technical routes are used for regulating and controlling the hydrodynamic force of the urban river network, but the following defects exist:

firstly, the comprehensive and careful analysis of the hydrodynamic conditions of the urban river network is lacking, the factors in multiple aspects such as the structure, the function and the characteristics of the river network are not considered, the self potential and the advantages of the river network are not fully utilized, and a differential regulation strategy is not formulated for different river channels and areas. And secondly, the accurate and intelligent control on the hydrodynamic regulation of the urban river network is lacking, the real-time monitoring and dynamic regulation on parameters such as the water level, the flow and the flow velocity of the river network are not realized, the advanced information technology and the intelligent technology are not utilized, and a high-efficiency hydrodynamic regulation system is not formed. And finally, the comprehensive and cooperative optimization of the hydrodynamic regulation of the urban river network is lacking, the comprehensive consideration and cooperative improvement of the hydrodynamic force, the water quality, the water ecology, the water safety and other aspects of the river network are not realized, and a sustainable water environment lifting scheme is not formed.

Thus, research and innovation is required.

Disclosure of Invention

The invention aims to provide a method and a system for accurately regulating and controlling hydrodynamic force of an urban river network and lifting water environment, so as to solve the problems in the prior art.

According to one aspect of the application, the urban river network hydrodynamic force accurate regulation and water environment lifting method comprises the following steps:

step S1, determining a research range of an urban river network, collecting research data in the research range and preprocessing;

s2, reading river network data in the research data, constructing an urban river network relation network, constructing and using an AM-GCN module to extract and classify the river network relation, forming a first river network relation network, constructing and using a Ring-GCN module to extract and remove isomorphic relation networks from the first river network relation network, and forming a second river network relation grid;

s3, constructing an SWMM-GAST-LSTM model aiming at the urban river network, reading research data as input, simulating the hydrodynamic process of the river network, and outputting a simulation result;

and S4, reading and analyzing the simulation result, analyzing and acquiring key nodes and key parameters of the accurate regulation and control of the urban river network hydrodynamic force, checking the key nodes and the key parameters, and outputting a river network hydrodynamic force accurate regulation and control scheme set if the accurate and efficient water distribution target is reached.

According to one aspect of the present application, the step S1 is further:

s11, acquiring a regional range of the urban river network, acquiring water system pattern data and water quality monitoring data of the urban river network, and defining a research range according to a research target, the water system pattern data and the water quality monitoring data;

Step S12, collecting river reach, hydrology, water quality, waterpower, hydraulic engineering and meteorological data including historical data and real-time monitoring data in a research range and a river basin where the research range is located to form a research data set;

and S13, calling a preconfigured method to preprocess each type of research data in the research data set, wherein the preprocessing comprises outlier processing, data filling and data normalization.

According to one aspect of the present application, the step S2 is further:

s21, reading water system pattern data and river segment data of a river network, forming river network data comprising river channel numbers, starting and ending nodes, lengths, widths, water depths, gradients and flow, and constructing a river network relation network; the river network relation network is preconfigured as an undirected graph network, nodes in the undirected graph network represent river channels, and edges represent connection relations among the river channels;

s22, constructing and using an AM-GCN module to extract and classify river network relations, adaptively learning importance information among river network nodes, and generating embedded vectors of the nodes according to characteristics and neighbor information of the nodes to represent hydrodynamic force and water quality characteristics of the nodes; then calculating the similarity of the embedded vectors, clustering the nodes according to the similarity of the embedded vectors to obtain river channels of different types, and forming a first river network relation network;

And S23, constructing and adopting a Ring-GCN module to perform isomorphic subgraph detection and removal, extracting and removing isomorphic relation networks from the first river network relation networks to form second river network relation grids, wherein the second river network relation grids comprise main characteristics and key nodes of river networks, and are convenient for subsequent hydrodynamic force simulation and water environment regulation.

According to one aspect of the present application, the step S3 is further:

s31, reading basic data including at least rainfall, topography, infiltration, land utilization, river network relation grids, drainage pipe networks and underlying surfaces from research data, constructing SWMM modules, GAST modules and LSTM modules aiming at urban river networks, and coupling to form SWMM-GAST-LSTM models;

s32, sequentially calculating the surface rainfall and infiltration sources, extracting the surface grid water level of the GAST module and the rainwater node water level of the SWMM module, then calculating the interactive flow of the SWMM module and the GAST module, inputting the interactive flow into the SWMM module, calculating the hydrodynamic process of the river network, and outputting the hydrodynamic simulation result of the river network;

and S33, taking a river network hydrodynamic force simulation result and historical data as inputs of the LSTM module, extracting time sequence characteristics of the river network nodes according to the spatial characteristics and the historical data of the river network nodes so as to simulate the hydrodynamic force and water quality change trend of each node of the river network, and outputting the simulation result.

According to one aspect of the present application, the step S4 is further:

s41, reading and analyzing a simulation result, and evaluating the water environment condition of the river network according to the water level, the flow and the water quality of the river network nodes, and judging whether the river network has hydrodynamic force and water environment problems including the water quality which does not reach the standard, the water quantity which is insufficient and the water flow which is unsmooth;

step S42, analyzing the mutual influence among the river network nodes according to the spatial characteristics and the time sequence characteristics of the river network nodes, and identifying key nodes of the river network, wherein the key nodes refer to nodes which have important influence on the hydrodynamic force and the water quality of the river network and comprise water source nodes, hydraulic engineering nodes and water quality sensitive nodes; determining key parameters of accurate regulation and control of river network hydrodynamic force based on the simulation result and the regulation and control target; calculating the influence ranges of the key nodes and the key parameters;

step S43, comparing the difference between the simulation result and the measured data, calculating the accuracy and reliability of the simulation, and evaluating the effectiveness and optimization degree of the scheme; outputting a river network hydrodynamic force accurate regulation scheme set if the simulation result reaches the river network hydrodynamic force accurate regulation target, and adjusting and optimizing the scheme until a satisfactory scheme set is obtained if the simulation result does not reach the river network hydrodynamic force accurate regulation target.

According to an aspect of the present application, the data acquisition process of step S11 further includes:

step S11a, remote sensing data and DEM data in a research range are obtained;

step S11b, extracting the shape, the position and the width of a river channel through influence data in remote sensing data, and acquiring spectrum data including color, transparency and reflectivity of water quality; extracting water system pattern data including river channel numbers, start-stop nodes, lengths and gradients through a GIS module, and acquiring water quality data including dissolved oxygen, ammonia nitrogen and chemical oxygen demand through spectrum data;

and step S11c, integrating the water system pattern data and the water quality monitoring data.

According to an aspect of the present application, in the step S23, after removing the isomorphic relation network, the method further includes:

step S23a, reading research data and a first river network relation network after isomorphism removal, obtaining historical data of river water flow, and constructing a river network relation adjacency matrix and a river network flow direction probability matrix;

step S23b, river water flow direction data in the historical data are called as priori information, and a specific numerical value of a flow direction probability matrix is constructed according to the priori information and calculated by using a Bayesian network model;

And S23c, generating a second river network relation grid at least comprising M pieces of directional data according to the direction probability matrix of the river network after the directivity assignment, wherein M is a natural number.

According to an aspect of the present application, the step S42 further includes:

step S42a, generating a simulation data set by adopting a preconfigured algorithm based on the key nodes and the key parameters;

step S42b, taking the simulation data set as input, calculating the influence range of each key node and key parameter through the SWMM module and the GAST module, and arranging the influence ranges in a descending order to form a simulation result set;

and step S42c, comparing the simulation result with monitoring data in the research data to judge whether the expected requirement is met.

According to one aspect of the present application, the process of obtaining the set of river network hydrodynamic accurate regulation schemes in step S43 further includes:

s43a, constructing a multi-objective optimization module for accurate regulation and control of river network hydrodynamic force, and determining an optimization objective and constraint conditions;

step S43b, solving by adopting a multi-objective optimization algorithm to obtain a non-inferior solution set;

and step S43c, optimizing a part of regulation and control scheme from the non-inferior solution set by adopting a TOPSIS method, and forming a river network hydrodynamic accurate regulation and control scheme.

According to another aspect of the application, a system for hydrodynamic accurate regulation and water environment lifting of urban river network is characterized by comprising:

at least one processor; and

a memory communicatively coupled to at least one of the processors; wherein,

the memory stores instructions executable by the processor for execution by the processor to implement the urban river network hydrodynamic accurate regulation and water environment lifting method of any one of the above technical schemes.

The method has the beneficial effects that the scheme achieves accurate regulation and control of the water level-flow of the urban river network, achieves the purpose of fine and efficient water distribution through the on-site demonstration of the hydrodynamic regulation and control effect, fully exerts the hydrodynamic regulation and control engineering benefit, improves the water quality of the river network and saves the water resource. Related technical advantages and economic and social effects will be described in detail below.

Drawings

Fig. 1 is a flow chart of the present application.

Fig. 2 is a flowchart of step S1 of the present application.

Fig. 3 is a flow chart of step S2 of the present application.

Fig. 4 is a flowchart of step S3 of the present application.

Fig. 5 is a flowchart of step S4 of the present application.

Detailed Description

As shown in fig. 1, according to one aspect of the present application, the method for precise regulation of urban river network hydrodynamic force and water environment lifting comprises the following steps:

The method effectively combines the advantages of deep learning and hydrologic model, can accurately simulate and regulate the hydrodynamic process of the river network, improves the water quality and water ecological condition of the river network, and provides scientific methods and tools for the management and protection of the urban river network. Specifically, by utilizing a large amount of river network data and by a deep learning method, the complex relationship of the river network is extracted, high-quality input is provided for hydrodynamic simulation, and the simulation precision and efficiency are improved. By organically integrating the hydrologic model and the deep learning model, the hydrodynamic process of the river network is simulated by utilizing the physical mechanism of the hydrologic model and the self-adaptive capacity of the deep learning model, the characteristics of nonlinearity, dynamics, randomness and the like of the river network are considered, the regulation and control effect of hydraulic engineering is considered, and the reliability and the adaptability of the simulation are improved. By using the simulation result, the key nodes and key parameters of the accurate regulation and control of the river network hydrodynamic force are analyzed and obtained, and the optimal regulation and control scheme is obtained through an optimization algorithm, so that the accurate regulation and control of the river network hydrodynamic force and the improvement of the water environment are realized, and the regulation and control effect and efficiency are improved. By accurately regulating and controlling the river network hydrodynamic force, the water distribution of the river network is optimized, the water supplementing quantity of the river network and the running cost of hydraulic engineering are reduced, water resources and energy are saved, and the water and energy saving concept is met. By improving the water quality of the river network, the transparency and dissolved oxygen of the water body of the river network are increased, the reproduction and diversity of aquatic organisms are promoted, the self-cleaning capacity and the pollution resistance of the river network are enhanced, and the ecological environment-friendly idea is met. By constructing a comprehensive water environment regulation and control system platform, the long-acting management and control of the river network water environment is realized, informatization and intelligent support is provided for the management and protection of the river network, and the idea of sustainable development is met.

In a certain embodiment, the urban river network hydrodynamic force ordered drainage simulation technology can accurately simulate the urban river network hydrodynamic force characteristics, finely simulate the distribution of the river water levels, the flow rates and the flow rates in the areas under different drainage schemes, determine the regional river network ordered drainage pattern, and provide technical support for optimizing the ordered drainage scheme. The gate pump station and the control engineering can be used for accurately controlling the water level and flow of the river network and activating the whole city water system. The urban water environment lifting recommendation scheme is subjected to field demonstration, the rationality and operability of the scheme are verified, the effect of improving the fluidity of the urban river network water body and the river network water quality is verified, an optimized hydrodynamic force regulation and control scheme is provided, and finally the purpose of refined and efficient water distribution is achieved.

As shown in fig. 2, according to an aspect of the present application, the step S1 is further:

and S11, acquiring the regional range of the urban river network, acquiring the water system pattern data and the water quality monitoring data of the urban river network, and defining a research range according to the research target, the water system pattern data and the water quality monitoring data. The purpose of this step is to determine the object and scope of the study in order to collect relevant data. For example, if a method for accurately controlling the hydrodynamic force of a river network and improving the water environment in a certain city is to be studied, an administrative map of the city needs to be acquired first to determine the regional scope of the river network. Then, the water system pattern data of the city needs to be acquired, including the position, length, width, depth, gradient, flow direction and other information of the river reach, so as to determine the topological structure of the river network. Then, water quality monitoring data of the city including water temperature, pH, dissolved oxygen, chemical oxygen demand, ammonia nitrogen, total phosphorus and other indexes of the river reach needs to be obtained to determine the water quality condition of the river reach. Finally, according to the research target, such as improving the water quality or water ecology of the river network, proper water system pattern data and water quality monitoring data are selected to define the research range, such as selecting some important or sensitive river segments as the research target.

And S12, collecting river reach, hydrology, water quality, waterpower, hydraulic engineering and meteorological data including historical data and real-time monitoring data in a study range and a river basin where the study range is located to form a study data set.

The purpose of this step is to collect various data within the scope of the study for hydrodynamic simulation and regulatory optimization. For example, if the scope of the study has been determined, the following data needs to be collected: river reach data: the system comprises information such as the position, length, width, depth, gradient, flow direction and the like of a river reach, and historical data and real-time monitoring data of variables such as the water level, flow rate, flow speed and the like of the river reach, wherein the data can be obtained from a hydrological station or a hydrological monitoring system. Hydrologic data: the method comprises the steps of rainfall, runoff, evaporation and other data of a river basin in which a research scope is located, and the water supplementing quantity, water intake and other data in the research scope, wherein the data can be obtained from a weather station or a water conservancy department. Water quality data: historical data and real-time monitoring data of indexes such as water temperature, pH, dissolved oxygen, chemical oxygen demand, ammonia nitrogen, total phosphorus and the like of a river reach are included, and the data can be obtained from a water quality station or a water quality monitoring system. Hydraulic data: including hydraulic characteristics of the river reach, such as hydraulic radius, hydraulic gradient, hydraulic drag coefficient, etc., which may be calculated or estimated from hydraulic formulas or hydraulic models. Hydraulic engineering data: the hydraulic engineering control system comprises information such as the position, the type, the scale, the operation mode and the like of the hydraulic engineering in a research range, and data such as the opening degree of a gate, the flow rate of a pump station and the like of the hydraulic engineering, wherein the data can be obtained from a water conservancy department or a hydraulic engineering management system. Weather data: the system comprises data of air temperature, humidity, wind speed, wind direction, air pressure and the like of a region where a research range is located, and the data can be obtained from a weather station or a weather forecast system.

And S13, calling a preconfigured method to preprocess each type of research data in the research data set, wherein the preprocessing comprises outlier processing, data filling and data normalization. The purpose of this step is to perform quality inspection and format conversion on the collected data for subsequent model construction and simulation. For example, if a study data set has been collected, the following pre-treatments are required: for each type of data, abnormal values such as values out of normal range, abrupt values, erroneous values, etc. are detected and removed, and these values may be caused by instrument malfunction, human misoperation, data transmission errors, etc., which may affect the accuracy and reliability of the data. Abnormal values such as a box graph method, a 3σ method, an isolated forest method, and the like may be detected and rejected using a statistical method or a machine learning method. For each type of data, detecting and filling missing values, such as data vacancies due to instrument failures, data loss, data imperfections, etc., can affect the integrity and continuity of the data. The missing values may be detected and filled in using interpolation methods or machine learning methods, such as linear interpolation, spline interpolation, KNN, EM, etc. For each type of data, data normalization is performed, namely, the data is converted into a unified numerical range, such as [0,1] or [ -1,1], so that dimension and scale differences of the data can be eliminated, and comparability and compatibility of the data are improved. Data normalization may be performed using a linear transformation method or a nonlinear transformation method, such as a maximum-minimum method, a normalization method, a logarithmic transformation method, and the like.

step S11a, remote sensing data and DEM data in a research range are obtained; and acquiring the surface features and the topography features in the research range by using a remote sensing technology and a digital elevation model, and providing a basis for subsequent data extraction and analysis. For example, if a method for accurately controlling river network hydrodynamic force and improving water environment in a certain city is to be studied, remote sensing data and DEM data of the city need to be acquired first, and the data can be acquired from sources such as satellite images, unmanned aerial vehicle images, aerial images and the like, and can also be downloaded from remote sensing data centers or websites in the country or place. The remote sensing data and DEM data may be of different formats and resolutions and need to be unified and standardized for subsequent processing.

And extracting water system pattern data and water quality data of the river network by using the remote sensing data and the DEM data, and providing input for subsequent model construction and simulation. For example, if the remote sensing data and DEM data of a city have been acquired, the following operations may be performed: and extracting the shape, the position and the width of the river channel through influence data in the remote sensing data. The influence data refers to the part of the remote sensing data reflecting the water body, generally has lower reflectivity and higher transparency, and can be segmented and extracted by using an image processing method, such as a threshold method, an edge detection method, a watershed method and the like, so as to obtain the shape, the position and the width of the river channel. The depth and gradient of the river channel, and the flow direction and river basin division of the river channel can be calculated by using the DEM data. And acquiring spectral data including color, transparency and reflectivity of the water quality through the spectral data in the remote sensing data. The spectrum data refers to the part of the remote sensing data reflecting the spectrum characteristics of the water body, generally has different wavelengths and intensities, and can be classified and identified by utilizing a spectrum analysis method, such as a principal component analysis method, a support vector machine method, an artificial neural network method and the like, so as to obtain the spectrum data of the water body, including color, transparency and reflectivity. The method can also utilize spectrum data to estimate other indexes of water quality, such as dissolved oxygen, ammonia nitrogen, chemical oxygen demand and the like, the indexes have certain correlation and functional relation with the spectrum data, and a regression analysis method, such as a linear regression method, a nonlinear regression method, an artificial neural network method and the like, can be utilized to establish a model between the spectrum data and the water quality indexes so as to obtain the water quality data. And extracting water system pattern data comprising river channel numbers, start and stop nodes, lengths and gradients through a GIS module, and acquiring water quality data comprising dissolved oxygen, ammonia nitrogen and chemical oxygen demand through spectrum data. The GIS module is a geographic information system module and is used for collecting, storing, managing, analyzing and displaying geographic space data, remote sensing data and DEM data can be integrated and processed by the GIS module to obtain water system pattern data, and the water system pattern data comprises information such as river channel numbers, start-stop nodes, lengths, slopes and the like, and the information can reflect the topological structure and hydrologic characteristics of a river network. The method can also integrate and process the optical data to obtain water quality data, including indexes of dissolved oxygen, ammonia nitrogen, chemical oxygen demand and the like, and the indexes can reflect the water quality condition and the water environment condition of the river network.

In a certain embodiment, the water system pattern data and the water quality monitoring data are matched and aligned, namely, the water system pattern data and the water quality monitoring data are spatially matched according to the information of river channel numbers, start-stop nodes, lengths and the like, so that each river segment has corresponding water system pattern data and water quality monitoring data. And meanwhile, according to the information such as the time stamp, the sampling frequency and the like, the water system pattern data and the water quality monitoring data are aligned in time, so that each river reach has corresponding water system pattern data and water quality monitoring data at each time point. And fusing and optimizing the water system pattern data and the water quality monitoring data, namely fusing the water system pattern data and the water quality monitoring data according to the quality, the reliability, the representativeness and other factors of the data, and improving the accuracy and the completeness of the data by utilizing the complementarity and the redundancy of the data. Meanwhile, according to factors such as importance, sensitivity and stability of the data, the water system pattern data and the water quality monitoring data are subjected to data optimization, and the effectiveness and sensitivity of the data are improved by utilizing the difference and the variability of the data.

As shown in fig. 3, according to an aspect of the present application, the step S2 is further:

the step is to convert the data of the river network into the data of the graph structure so as to process the graph neural network. For example, the water pattern data and the river reach data of the city need to be read first, and these data may be obtained from a hydrological station or hydrological monitoring system, or may be extracted from remote sensing data and DEM data, as described above. Then, the data needs to be integrated into river network data, including river channel number, start-stop nodes, length, width, water depth, gradient, flow and other information, which can reflect the hydrologic characteristics and hydraulic characteristics of the river network. Then, river network data is required to be constructed into a river network relation network, namely an undirected graph network, wherein each node represents one river channel, each side represents the connection relation between two river channels, and the weight of the side can be calculated or assigned according to the information such as the length, the width, the water depth, the gradient, the flow and the like of the river channels so as to reflect the water distribution and the water quality influence among the river channels.

Alternatively, the following steps may be employed:

and integrating the data of the river network into a unified data set, so that the subsequent processing is convenient. The data of river network can be read from different data sources by using a data reading method, such as a file reading method, a database reading method, an API reading method and the like, and stored as a data table or a data frame, wherein each row represents a river segment, and each column represents an attribute, such as river channel number, start-stop node, length, width, water depth, gradient, flow and the like.

The topology structure of the river network, namely the connection relation between the river channels, can be extracted from the river network data by using a graph construction method, such as an adjacency matrix method, an adjacency list method, an edge list method and the like, and stored as an undirected graph network, each node represents a river segment, each edge represents the connection relation between two river segments, and the weight of the edge can be calculated or assigned according to the attributes of the river segment, such as length, width, water depth, gradient, flow and the like.

S22, constructing and using an AM-GCN module to extract and classify river network relations, adaptively learning importance information among river network nodes, and generating embedded vectors of the nodes according to characteristics and neighbor information of the nodes to represent hydrodynamic force and water quality characteristics of the nodes; then calculating the similarity of the embedded vectors, clustering the nodes according to the similarity of the embedded vectors to obtain river channels of different types, and forming a first river network relation network; the method is used for extracting complex relationships of river networks from the river network relationship network, including space connection, water distribution, water quality influence and the like of the river networks, and classifying the river networks according to the relationships to obtain different types of river channels.

In a certain embodiment, the AM-GCN module refers to an adaptive multi-head graph rolling network module, which is capable of adaptively learning importance information between nodes of a river network, and generating an embedded vector of the node according to characteristics and neighbor information of the node, and representing hydrodynamic force and water quality characteristics of the node. The method of the graph neural network, such as a graph convolution method, a graph injection method, a graph pooling method and the like, can be utilized to construct and use an AM-GCN module to carry out information transmission and feature extraction on the river network relation network, so as to obtain an embedded vector of each node, and the embedded vector represents hydrodynamic force and water quality characteristics of the node.

And classifying the nodes of the river network by using the similarity of the embedded vectors to obtain different types of river channels, and providing input for subsequent hydrodynamic simulation. The similarity of the embedded vectors of each two nodes can be calculated by using a similarity calculation method, such as Euclidean distance method, cosine similarity method, manhattan distance method and the like, and the similarity of hydrodynamic force and water quality characteristics of the two nodes is represented. Then, clustering can be performed on the nodes according to the similarity of the embedded vectors by using a clustering analysis method, such as a K-means method, a hierarchical clustering method, a spectral clustering method and the like, so as to obtain different types of river channels, such as a river channel with large water quantity, a river channel with poor water quality, a river channel with complex water power and the like. Finally, a first river network relation network can be constructed by using a graph construction method, such as an adjacent matrix method, an adjacent list method, an edge list method and the like according to the type and the connection relation of the nodes, and the complex relation and the classification result of the river network are represented.

And S23, constructing and adopting a Ring-GCN module to perform isomorphic subgraph detection and removal, extracting and removing isomorphic relation networks from the first river network relation networks to form second river network relation grids, wherein the second river network relation grids comprise main characteristics and key nodes of river networks, and are convenient for subsequent hydrodynamic force simulation and water environment regulation. The objective of the step is to extract and remove isomorphic relation networks, namely subgraphs with the same structure but different contents, from a first river network relation network by using a method of a graph neural network, wherein the subgraphs have no great influence on hydrodynamic force and water environment of the river network, but increase the complexity and the calculated amount of simulation, so that the isomorphic relation networks need to be removed, the simplified representation of the river network is obtained, and input is provided for subsequent hydrodynamic force simulation.

In a certain embodiment, the Ring-GCN module refers to a graph rolling network module based on a Ring structure, and can detect and remove isomorphic relationship networks in a river network relationship network, namely subgraphs with the same structure but different contents. The Ring-GCN module can be constructed and used by using a graph neural network method, such as a graph convolution method, a graph injection meaning method, a graph pooling method and the like, so that information transmission and feature extraction can be carried out on the first river network relation network to obtain an embedded vector of each node, and the embedded vector represents hydrodynamic force and water quality features of the node. Then, isomorphic relation networks, i.e. subgraphs with the same structure but different contents, can be extracted and removed from the embedded vectors by using a ring structure method, such as a ring counting method, a ring feature method, a ring matching method, etc., and the subgraphs have no great influence on the hydrodynamic force and the water environment of the river network, but increase the complexity and the calculation amount of simulation, so that the isomorphic relation networks need to be removed. And removing redundant information in the first river network relation network to obtain a simplified representation of the river network, and providing input for subsequent hydrodynamic force simulation. The method of graph construction, such as an adjacency matrix method, an adjacency list method, an edge list method and the like, can be utilized to extract and remove isomorphic relation networks from the first river network relation network according to the types and the connection relations of the nodes, so as to form a second river network relation grid, and the second river network relation grid represents main characteristics and key nodes of the river network, such as a river channel with large water quantity, a river channel with poor water quality, a river channel with complex water power and the like.

In this embodiment, by using a river network with a relatively small level-difference in plain area, the simulation calculation efficiency is greatly affected in a similar and undirected manner because the flow direction is not fixed. By combining the historical data, the maximum several possible flow directions are searched, the undirected direction is reduced to a specific several directed modes, and the simulation and emulation efficiency is improved.

As shown in fig. 4, according to an aspect of the present application, the step S3 is further:

The data may be obtained from various sources such as weather stations, remote sensing images, hydrologic stations, hydraulic engineering, etc. Such data needs to be preprocessed, such as format conversion, projection conversion, spatial matching, temporal matching, etc., so that it can be analyzed on the same platform. The SWMM module refers to a storm runoff model module, and can simulate a drainage system of an urban river network, including a river channel, a pipeline, a reservoir, a pump station and the like. The GAST module refers to a surface water dynamic model module, and can simulate a surface water system of an urban river network, including surface runoff, surface water level, surface flow rate and the like. The LSTM module refers to a long-term and short-term memory network module, and can simulate the time sequence characteristics of the urban river network, including water level, flow, water quality and the like. The SWMM module, the GAST module and the LSTM module can be respectively constructed by utilizing a hydrological analysis toolbox of the ArcGIS platform, HEC-RAS software, a TensorFlow framework and the like, and the three modules are coupled together through data exchange and parameter transmission to form a comprehensive SWMM-GAST-LSTM model.

And calculating the rainfall and the infiltration of the surface by using rainfall data and topography data, and using the rainfall and the infiltration as the input of a surface hydrodynamic model. The method can utilize a hydrological analysis toolbox of the ArcGIS platform to perform rainfall interpolation, topographic analysis, infiltration analysis and the like to obtain grid data of surface rainfall and infiltration sources. And (3) using grid data of the surface rainfall and the infiltration source to be respectively input into the GAST module and the SWMM module, and calculating the surface grid water level and the rainwater node water level as the basis of the interactive flow of the SWMM module and the GAST module. The grid data or vector data of the surface grid water level and the rainwater node water level can be obtained by respectively constructing and operating the GAST module and the SWMM module by utilizing a hydrological analysis toolbox of the ArcGIS platform.

And calculating the interactive flow between the SWMM module and the GAST module, namely the inflow and outflow amount between the surface water and the drainage system by using the grid data or the vector data of the surface grid water level and the rainwater node water level as the input of the SWMM module, and reflecting the regulation and control effect of hydraulic engineering. The space analysis tool box of the ArcGIS platform can be utilized to perform grid operation, vector operation, space connection and the like, so that grid data or vector data of the interactive flow of the SWMM module and the GAST module are obtained and input into the SWMM module. Calculating the hydrodynamic process of the river network, outputting a river network hydrodynamic simulation result, and running the SWMM module and the GAST module again by utilizing raster data or vector data of the interactive flow of the SWMM module and the GAST module to calculate the hydrodynamic process of the river network, so as to obtain parameters such as water level, flow, water quality and the like of each node of the river network, wherein the parameters are used as the input of the LSTM module and also are used as the input of water environment regulation and control. And the GAST module and the SWMM module can be operated again by utilizing a hydrological analysis toolbox of the ArcGIS platform to obtain raster data or vector data of a river network hydrodynamic simulation result.

The data conversion toolbox of the ArcGIS platform may be used to convert raster data or vector data into a data format required by the LSTM module, such as a CSV file or a TXT file, and combine with historical data. And extracting time sequence characteristics of the river network nodes, such as change rules and periodicity of parameters of water level, flow, water quality and the like, according to the spatial characteristics and the historical data of the river network nodes by utilizing the deep learning capability of the LSTM module. The neural network structure of the LSTM module can be built by using a TensorFlow framework, parameters of the network such as an input layer, a hidden layer, an output layer, an activation function, a loss function, an optimizer and the like are set, and training and testing are performed. The method is characterized by simulating the variation trend of the hydrodynamic force and the water quality of each node of the river network, outputting the simulation result, simulating the variation trend of the hydrodynamic force and the water quality of each node of the river network, such as the future variation condition of parameters of water level, flow rate, water quality and the like, by utilizing the prediction capability of the LSTM module, and outputting the simulation result, thereby providing reference and suggestion for water environment regulation. The prediction function of the LSTM module can be operated by using the TensorFlow framework to obtain the prediction result of the hydrodynamic force and the water quality of the river network nodes, and the prediction result is converted into raster data or vector data so as to be visualized and analyzed.

In the embodiment, the self-adaptive capacity of deep learning and the physical mechanism of the hydrological model are utilized, the characteristics of nonlinearity, dynamics, randomness and the like of the river network and the regulation and control function of hydraulic engineering are considered, the parameters of water level, flow, water quality and the like of each node of the river network are accurately simulated, and scientific basis is provided for water environment regulation and control.

As shown in fig. 5, according to an aspect of the present application, the step S4 is further:

in one embodiment, the predicted results of the LSTM module are read and converted into a data format suitable for analysis, such as an Excel file or database table. And reading the CSV file or the TXT file, and performing data processing and conversion. And (3) analyzing the simulation result, calculating the water environment index of the river network, such as the water quality comprehensive index water resource utilization rate, water flow connectivity and the like, according to the water level, the flow and the water quality of the river network nodes, evaluating the water environment condition of the river network, and judging whether the river network has hydrodynamic force and water environment problems. The analysis module can be used for carrying out numerical calculation and statistical analysis to obtain the water environment index of the river network, and comparing the water environment index with the relevant standard to judge whether the water environment condition of the river network reaches the standard. If the river network is found to have hydrodynamic force and water environment problems, such as substandard water quality, insufficient water quantity, unsmooth water flow and the like, the type, the position and the degree of the problems are recorded, and a reference is provided for subsequent water environment regulation. The water environment index distribution map of the river network can be drawn by utilizing the drawing module so as to intuitively display the water environment condition of the river network and mark out the nodes and the segments of the river network with problems.

in a certain embodiment, the connection relationship between the nodes of the river network can be represented by using the topological structure of the constructed river network. The method can divide the river network nodes into different categories according to the spatial characteristics and the time sequence characteristics of the river network nodes by utilizing cluster analysis library cluster analysis, such as water source nodes, hydraulic engineering nodes, water quality sensitive nodes and the like, and identify key nodes of the river network, such as the influence of the water source nodes on water quantity, the influence of the hydraulic engineering nodes on water flow, the influence of the water quality sensitive nodes on water quality and the like. The optimization algorithm can be utilized to find the optimal parameters of the accurate regulation and control of the hydrodynamic force of the river network according to the simulation result and the regulation and control target, such as water quantity regulation of a water source node, water flow control of a hydraulic engineering node, water quality improvement of a water quality sensitive node and the like, so that the water environment index of the river network reaches the optimal or closest target value. The sensitivity analysis module can be used for calculating the influence degree and range of key nodes and key parameters on river network water environment indexes, evaluating the effect and risk of river network hydrodynamic force accurate regulation and control, and providing decision support for water environment regulation and control.

By checking the influence ranges of the key nodes and the key parameters, the method is favorable for providing a more accurate regulation scheme later, and the best economic, social, engineering and ecological effects are obtained. For example, in a certain project, the water demand of the river network is calculated through the urban river network hydrodynamic force precise regulation and control technology, the key control node layout control and guide project is searched, regional hydrodynamic force reconstruction is realized, the river network water level-flow is precisely controlled by adopting the local node optimization regulation and control technology, and the maximum benefit of the hydrodynamic force regulation and control project is exerted.

Such as precisely controlling the gate overcurrent flow of certain nodes. In plain cities, river channel hydrodynamic force regulation and control are realized mainly by means of power driving of an existing sluice pump, and sluice overflow flow accurate control technology can accurately control sluice opening so as to achieve the aim of regulating and controlling flow to ideal flow. The gate overflow flow accurate control technology is characterized in that a gate flow ratio measurement and a flow coefficient and a relation curve in an area are calibrated by a method of an on-site prototype observation test or a physical model test, so that a gate water level-flow relation curve is obtained, the gate opening of a river channel under a certain flow can be determined by inquiring the curve, and the flow of the river channel can be accurately controlled by performing gate regulation and control according to the opening, so that the aim of accurate regulation and control is fulfilled.

In addition, the most commonly used regulation and control mode in plain river network areas is gate pump regulation and control, but the gate pump regulation and control range is limited, and a pump station is started to generate more operation cost, the gate is started to easily cause the sudden increase of local water flow velocity to cause the disturbance of river bottom mud, therefore, the movable overflow weir engineering regulation and control measures are provided for the plain river network areas, the river network water level difference can be manually built, a self-flowing pattern is formed, the water flow is promoted to enter a medium-small river channel, and the operation cost of the pump station is reduced.

The movable overflow weir engineering is arranged at the key position of the river network in the main urban area, so that reasonable water level conditions can be formed, the flow distribution of the river network is controlled, and the mobility of the middle and small river channels is promoted. Three groups of overflow weir comparison schemes are developed for selecting the positions and the number of overflow weirs in the main urban area of Changzhou city, the numerical simulation of the water activating effect is developed based on the river network hydrodynamic force ordered drainage simulation technology, the better water activating scheme is determined, the water is automatically flowed, and the water quality in the whole area is improved.

It should be noted that the model, the solving method and the preferred method of the multi-objective optimization are more, and the present embodiment is only a preferred embodiment and is not intended to limit the technical concept of the present application.

At least one processor; and

a memory communicatively coupled to at least one of the processors; wherein,

In a certain embodiment, the urban multi-source complementary water source guaranteeing technology comprises two aspects of water source water quality guaranteeing and water source self-flowing guaranteeing, the water quality guaranteeing rate (the month number of IV class and above is reached to be occupied), and the river and lake with abundant water quantity can be used as a water supplementing water source of a plain city; the water level assurance rate analysis method based on the daily average water level comprehensive duration curve is provided, and the self-flow assurance rate of the water replenishing source is obtained through the water level assurance rate, so that the water replenishing mode of the regional water source is determined. According to the urban multi-source complementary water source guarantee technology, the Yangtze river, the gecko lake, the southwest canal and the Wuyi canal can be used as water supplementing water sources, the self-flow guarantee rate of supplementing water to the south of the Yangtze river at the high tide level and the southwest canal is higher, and if the water supplementing of the Yangtze river at the low tide level, the gecko lake and the Wuyi canal is utilized, power measures are needed.

In a word, in the application, the hydrologic model and the deep learning model are organically integrated together, the hydrodynamic process of the river network is simulated by utilizing the physical mechanism of the hydrologic model and the self-adaptive capacity of the deep learning model, the characteristics of nonlinearity, dynamics, randomness and the like of the river network and the regulation and control function of hydraulic engineering are considered, and the reliability and the adaptability of the simulation are improved. The SWMM-GAST-LSTM model is organically integrated, and the complementation and the coordination of the models are realized through data interaction and parameter sharing, so that the overall performance and the accuracy of the models are improved, and the hydrodynamic characteristics and hydrodynamic changes of the river network can be reflected. The method not only can simulate the rainfall-runoff-pollutant transfer process of the urban river network, has higher physical rationality and practicability, can reflect the hydrologic characteristics and water quality changes of the river network, but also can adaptively capture the space-time correlation and nonlinear characteristics of the river network, and has stronger self-adaptive capacity and generalization capacity. Furthermore, complex relationships of the river network are extracted from the river network relationship network by using a method of the graph neural network, including space connection, water distribution, water quality influence and the like of the river network, and the hydrodynamic characteristics and hydrodynamic changes of the river network are analyzed by using simulation results, so that key nodes and key parameters for accurately regulating the hydrodynamic force of the river network are identified, and the nodes and the parameters have important influences on the hydrodynamic force and the water environment of the river network and are important and difficult to regulate. The optimization algorithm is adopted to optimize key nodes and key parameters of the accurate regulation of the river network hydrodynamic force according to the target of the accurate regulation of the river network hydrodynamic force, such as improving water quality, increasing water quantity, balancing water level and the like, so that an optimal regulation scheme is generated, the accurate regulation of the river network hydrodynamic force and the improvement of the water environment are realized, and the regulation effect and efficiency are improved.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the equivalent changes belong to the protection scope of the present invention.

Claims

1. The urban river network hydrodynamic accurate regulation and water environment lifting method is characterized by comprising the following steps of:

2. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting according to claim 1, wherein the step S1 is further:

3. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting according to claim 1, wherein the step S2 is further:

4. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting according to claim 1, wherein the step S3 is further:

5. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting according to claim 1, wherein the step S4 is further:

6. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting according to claim 5, wherein the data acquisition process of step S11 further comprises:

step S11a, remote sensing data and DEM data in a research range are obtained;

7. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting according to claim 5, wherein in step S23, after removing the isomorphic relation network, the method further comprises:

8. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting according to claim 5, wherein said step S42 further comprises:

9. The method for precise regulation and control of urban river network hydrodynamic force and water environment lifting as claimed in claim 5, wherein the process of obtaining the river network hydrodynamic force precise regulation and control scheme set in step S43 further comprises:

10. The utility model provides an accurate regulation and control of urban river network hydrodynamic force and water environment promotion system which characterized in that includes:

at least one processor; and

a memory communicatively coupled to at least one of the processors; wherein,

the memory stores instructions executable by the processor for execution by the processor to implement the urban river network hydrodynamic accurate regulation and water environment lifting method of any one of claims 1 to 9.